from sys import argv
scirpt, input_file = argv
def print_all(f):
    print(f.read())

def rewind(f):
    f.seek(0)

def print_a_line(line_count,f):
    print(line_count, f.readline())

current_file = open(input_file)

print(f"First let's print the whole files\n")
print_all(current_file)

print(f"Now,let's rewind,kind of like a tape.")
rewind(current_file)

print("Let's print three lines.")

current_line = 1
print_a_line(current_line, current_file)
current_line += 1
print_a_line(current_line, current_file)
current_line += 1
print_a_line(current_line, current_file)

